The “kidnap mom” who swiped a newborn girl from Harlem Hospital in 1987 and raised the child as her own is pleading for leniency on grounds that she’s no longer a danger to society.

In Manhattan federal court papers filed today, Ann Pettway says she has “deep contrition for what I have done and sincerely apologize to the parents.

“It may not sound correct on paper but I am hopeless(l)y SORRY,” she said in a hand-penned letter to the judge.

Pettway is set to be sentenced Monday for the sensational kidnapping of Carlina White, who was reunited with her real parents last year after tracking them down through the National Center for Missing and Exploited Children.

Pettway’s plea deal calls for up to 151 months in the slammer, but her public defenders contend that a “ten-year sentence for this broken and severely depressed 50-year-old woman is more than sufficient.”

The Manhattan federal court filing says Pettway “was motivated not by greed or desire to do harm, but by a desperate desire for child” following “two stillbirths and several miscarriages.

“Moreover, Ms. Pettway’s specific offense was inextricably linked to her inability to bear a child during her child-bearing years, making the likelihood virtually zero that she would ever participate in such an offense at this advanced age,” her legal team wrote.

“Nor is she likely, in her sixties, to engage in the kind of petty crimes, like shoplifting and small drug offenses, that make up her criminal history.”

Court papers also note that White — who “was raised as a beloved daughter” — “has declined to speak with either defense counsel, the government or the probation department.”

“She is represented by counsel, has a movie project in the works, and refuses to be involved in any way in the criminal case,” according to Pettway’s lawyers.

A spokeswoman for the Manhattan U.S. Attorney’s Office declined to comment.